How Probiotics Are Fueling a Toxin-free Skincare Revolution

"Close your eyes and focus on the first image that pops into your head when I say 'nature'," Dr Larry Weiss tells me over the phone. "Okay, now ... does the image include any humans?" Weiss, the CEO of skincare company AO Biome, says that he has posed this question to thousands of people, but not a single person has ever answered yes.